Push button for automatic overload



A. PARKER. PUSH BUTTON FOR AUTOMATIC OVIERLOAD'l APPLICATION FILED OCT. 27| T919.

Patented Apr. 25, 1922..

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ARTHUR PARKER, E HAnnoNnEreHTs, NEW JERSEY, AssreNoR or ONE-Turin; To

LEON e. BUGRWALTER, 0E MERCRANTVILLE, NEW JERSEY, AND ONE-THTRD To CHARLES REDDING, 0E cLEM-EINTON,v NEW JERSEY.

'PUSH BUTTON EoR AUTOMATIC o vEREoAD. Y

rglinal application filed. July 15, 1919,

To all whom 'it may concern:

Be it known 'that I, ARTHUR PARNER, a citizen of the United States, residing at Haddon Heights, county of Camden, State ot' New Jersey, ha-ve invented a new and useful Pushl Button for Automatic Overload,` of

' which the-following is a specification.

l matic overload releasing switch being In a contemporaneously pending application'iiled by me on July 15th, 1919, Serial No. 310,985, of whichf'this application is a division, I have shown a novel construction of automatic., overload', releasingswitch for electrical' tools, suchas electric drills, reamers and the like, whereinV I employ an electromagnet in series with the drill'motor a-nd contained within the drill handle, said autoalso contained in said handle Vand adapted to be closed by a novel construction..oie a push button and its adjuncts having suitable .connections to said switch. s 1 Y My present invention relates more particularly to the push button and its adjuncts and its novel resetting mechanism in con* junction with means for limiting the upward and downward move-ment ofthe push but'-y ton, the latter being especially .applicable tol the operation otimechanism'loeat'ed near tol or at a little distance therefrom.

It further eonsists'of Aa novel construction and collocation of an electric drill handle,

' containing both a push button and the prin'- cipal mecha-nical andl electrical elements coacting therewith, saidV push button having a. wooden or nonconductingspindle extend'- ing longitudinally from-'ity to .the switch mechanism Iactuated thereby, wherebyV all live parts outside of the 'handle are abolished and the opportunity for electrical trouble is reduced to a minimum.

It further consists ot the employment ot a -push button having a guard around it whichy prevents Vaccidental closingV of the'v switch thus saving the operator and the machine from injury, said push' buttonl having also novel means .coacting therewith for limiting its upward and downward movement. yitl-'further consists of a novel vconstruction of push button and levers actuated thereby in conjunction with a tension device for automatically resetting said push button.

It further consists of a novel construction which my invention consistscanbe i'fariously.

ltalities as herein shown and described'.

Specification of Letters Patent. -Pgttentd Apr, 2.5, 1922k serial N Q. 310,985. Divided and this application inea catetere?, @1919. serial No. 333,569.

upward and downward movement oit the push button is vlimited according to require- It further consists of 'other novel features of construction, all aswill. be hereinafter fully set forth. Y

For the purpose ofy illustrating my invention, I hc ve shown in ,the accompanying drawing one form thereof which is at pres. 65 ent preferred by me, since the samewill be io'und in `practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities ol:

arranged vand organized and; VAthat my invention is not limited to-.tjhe precise arrangement and organiZationl oftheseinstrumen-vA Figure 1 represents' a longitudinal, sec# 75 tional view of an electric drill handle hav-v ing my noveliconstruction of automatic overload releasing switcl'rtherein' and showing also Vin elevation novel construction oi pushbutton and its resetting.mechanism,4 Figure 2l represents a sectiononline 2 2 of Figurel. Y' .f U Figure 3 represents' a perspective view of the'push button and its pendant blade in detached position.v 'f Figure ivrepresentd on an enlarged scale, a plan view of Athe/push button resetting mechanism, the push' but-ton being removed. Figure 15. represents, on an enlarged scale, a side elevation of Figure Il, showing the push button inposition.

Similar numerals of corresponding partsfy Referring to the drawings. Y v. 1 designates my novel construction of push button, the same comprising a head2, whichhas the pendant blade ori-flat stemB, through which a pin 14 extends transversely. 'The push button i's-vertically movable in th'efhole 5 in the electric drill handle 6 and is prrr vided with a iard 7, theconstruction and location of w ich. will beV apparent -fr'om Figures' 1 and 2,*the function of said guard heiligA tov lprevent accidental depression yof lreference indicate the push button or closing of the switch thereby saving both the operator and the machine. y K

A6 designates a flat, resilientrplate or spring, which is lixed or secured at one end as 9 to the interior of the drill handle 6 by means of screws 10 or other fastening devices, `the opposite end of said spring 8 being bifurcated or provided with the 'forked arms 11, which engage each side of the pendant blade or flat stem 3, as will be apparent from Fig ures 2 and 3, said arms 11 being below or in contact with the bottom shoulder 12 ot the push button. The pendant blade or flat stem 3 ot the push button is guided in its up and down movement between the vertical plates 13 and in the space between said plates is itulcruined at 1-1 an angular shaped resetting lever, composed ot the three arms or members 15, 16 and 17 which are preterably integral, the contour and collocation ot said arms being understood 'trom Figure 1.

rlhe upper end ot' the arm 15 is rounded as indicated at 18 and contacts with or is engaged bythe curved seat 19 in the bottom edge of the pendant blade or flat stem 3'ot the push button, so that it will be seen that when said push button is depressed the arm 15 will be depressed and the arm 16 elevated vor rocked upwardly thereby exerting an upward pull yalso on the arm 17, which latterA has 'connected thereto the end 2O of the spring 21, the opposite end 22 of the latter being connected tothe arm 23 ot the plate or strip 211 which is Vsecured within the bottom of the handle 6 by means ot screws 25 or other equivalent fastening devices.

26 designates a yoke having the arms 2T extending rearwardly or to the lett thereof, the left hand ends of said arms being pivotally attached to the angular resetting lever at the junction of the arms 16 or 17 by means of the pin 28.

The yoke 26 is provided with` a socket 29 in which is seated the end of the wooden rod or nonconducting spindle 30 whose opposite end is connected to a suitable portion of the actuating mechanism o1 my novel construction 'of automatic overload releasing switch 21, which'is contained in the handle 6 or an extension thereof, said handle being secured to the casing 32 of an electric drill or reamer 33, which is provided with the electric `motor 34, said casing forming the field frame for the drill motor and as the yelectric drill per se forms no part kof my present invention and-may be or' any conventional type as disclosed in patents Nos.

936,870 and 1,109,325, l deem it unnecessary to describe the same in greater detail, as

-the general arrangement and collocation et the driving and driven mechanism and the reducing gearingl common thereto, is: well known to those skilled in the art.

l deem it also unnecessary to describein contacts, suitable electromagnetic means being provided for automatically opening said contacts whenthe drill motor becomes overloaded, the electromagnet being designated as 35, its core as 36, the latter having` connected thereto the piston rod 370i a shock absorbing device 38. rl`he right-hand end of the nonconducting spindle 39 is connected to a slotted cam member 38X which coacts 'with suitable levers and tripping mechanism, which l have indicated generally as 39, but do not deem it necessary to describe the operation o1r these parts in detail, as the same, per se, form no part of my present invention, it being understood that the right-hand end ot' the nonconducting spindle 30 is adapted to be connected generally to any element to be actuated as a portion of a switch actuatf ing mechanism of any desired type, my present'invention being confined solely to the push button, its connections to the nonconducting spindle 30, and its resetting'means.'

The operation is as Vfollows i The parts Y normallyappear as seen inV Figures 1, 2 and 3, fthebiiurcated ends ot the flat spring 8 engaging the shoulder 12 of the push button 2 'and retaining the latter normally in vits uppermost position substantially as seen in Figure 1,*the spring 21 holding the end 18 of the resetting'rlever in Vproper position with respect to the recess 19 of the blade 3. V1When the push button is depressed, the arm 15 is depressed or rocked downwardly whereupon'thearm 16 vis rocked upwardly on its fulcrum 14 and the arms 27 the yoke 26 and nonconducting spindle 30 move longitudinally to the right of the position seen in Figures 1 and 5, thereby operating the desired element to be actuated. v lUpon the pressure Aor the operators inger being removed from the push button the tension of the spring 21 which was eX- panded when the push button was depressed will restore the parts to the position seen in Figures 1, 2 and 5. The pia 4 by its contact with the underside of the bifurcated arms 11 will prevent the push button from an undue improper movement upwardly and its contact with the top edges ot the plates 13 will prevent undue downward movement while in both its upward and downwardmovement said pendant blade or'iat stem 3 is guided between the vertical parallel plates 13 as will beunderstood by reference to Figures 2, 4 and 5.

" 1t will be understood trom the foregoing the handlev member `6 with a screw cap or exterior left-hand closure 40 which upon being removed renders thel interior of the handle at once accessible and the parts comprising my novel pushf'button mechanism and their adjuncts can be readily removed upon the removal of the as will be evident.

It will now be apparent that I havev de-` vised a novel and useful construction of a push button for automatic overload which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have, in the present instance, shown and described a preferred embodimentV thereof` which will be found in practice to give satisfactory and reliable results, it is to be understood .that the same is susceptible of modification in various particulars withoutdeparting from the spirit or scope of the invention o r sacricing any ofV its advantages.

Having 'thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. As an improvedarticle of manufacture, a push button having a` shoulder on its bottom, a pendant blade .depending below said shoulder and provided with a curved seat, a spring pressed lever connected with said push button in the curved seat thereorn for retaining said button in its upward positicn, and a transverse pin Vin said pendant blac e.

2. As animproved article of manufacture,

a push button having a shoulder on its bottom, a pendant blade or flat stem; projecting below said shoulder and provided with a curved seat, a spring pressed lever connected with said pendant bladein the curved seat thereof for retaining said button-in its upward position, a 4transverse pin in said flat stem, and means coacting with said pin for limiting the upward and downward movement of said push button.

8. In a. device of the character stated, a tubular member having a push button movable therein, shoulders on said push button, a

stem depending below said shoulder, a pin extending transversely through said stem, anda spring secured to the interior of said tubular member and having va bifurcated end receiving said steml and located between screws 10 Aand 25Y ders, a pinextending. transversely through said stem, a spring secu-red to the interior of said tubular member and having a bifurcated end receiving said,l stem and located between said shoulders and pin, and means for arresting the downward movement of said pin and push button.

5. A deviceof the character stated comprising, a tubular member, a push button movable therein, a spring pressed angular lever secured to said tubular member and connected to said push buttomand an insulating lever in said tubular member connected to said angular lever and movable longitudinally in said tubular member when said push button is actuated.

6. A device of the character stated comprising, a tubular member, a lpush button movable therein, means for limiting the vertical movement of said push button, a spring pressed angularlever secured to said tubular member and connected to said push button, and an insulating lever in said tubular member connected to said angular lever and movable.longitudinally insaid tubul-ar member when said push. button i's'actuatech' 7. The combination ofva tubular member, -a push button having a pendant bladeprovided with a curved seat.v in. the end' thereof-y movable in said-tubular: member at `a'nfangle to the axis" of saidA tubular-member, an insulated spindle vextendingv through said tubular button and spindle, and means for resetting said push button and simultaneously actuating said spindle after pressure is removed from said push button.

8. A device of the character stated, comprising a tubular member, a push button movable'therein at an angle to the axisof said tubular member and having a shoulder on its lower portion and a pendant blade, a flat spring having one end secured tosaid handle and its other; end bifurcated and having arms straddling said blade below said shoulder, a pin extending transversely through'said pendant blade, a pair of vertical plates below said stem between which said stem is guided, a longitudinally extending insulating spindle, and connections intermediate said push button and Aspindle for actuating the latter longitudinally.

9. In a device of the character stated, a

hollow handle member, vertical plates secured to the interior thereof, a push buttonv having a pendant flat stem guided between said plates, a lever having-one vend in contact with the bottom of said stem, a tension device connected with'the opposite end of said lever, an insulating spindle extending at an angle to said push button, and connections from said spindle to said lever, whereby said push button, lever and spindle' are actuated in unison.

10. In a device of the character stated, a

tubular member, a push button movable therein and having a pendant stem, a recess in said stem,an angular resetting lever having an end engaging said stem, a tension device attached to the opposite end of said lever, a yoke, an insulated spindle secured in said yoke, and arms projecting from said yoke and pivotalljT secured to said angular lever.

1l. ln a device of the character stated, a tubular member', a push button movable therein, and having a pendant stem, a recess in the bottom of said stem, an angular resetting lever having an end engaging said recess, a tension device attached to the oppon site end of said stem, vertical plates Within which said push button stem is guided, said lever being ulcrumed between said plates, a yoke having an end oi an insulated spindle attached thereto, and arms projecting from said yoke and guided by said plates, said arms being pivotally attached to said lever.

l2. In a device of the character stated, a tubular member, a push button lmovable therein and having a pendant stem, a recess in the bottom of said stem, an angular resetting lever having an end engaging said recess, a tension device attached to the opposite end of said stem, vertical plates Within which said push button stem is guided,said lever'being -ulcrumed between-said plates, a yoke having an end of an insulated spindley at- I tached thereto, and arms projecting from said yoke and guidedl by said plates, said' angularly mounted therein, an insulated spindle Vextending through said tubular member, means Within said tubular member igor limiting the upward and downward movement of said push button, andA resilient means mounted Within said tubular member and connected to said push button for'urging the latter to normal position. 14. A device of the character stated comprising, a handle, a push button angularly mounted and reciprocable Within said handle, means for limiting the reciprocation of said push button., an insulated spindle reciprocable Within said handle having one end connected to controlling mechanism, a pivotally mounted rigid connection between said push button and insulated spindle, and resilient means secured Within said handle and to said rigid connection for urging said push button to normal position and Yfor returning the insulated spindle to normal position through the medium of said vrigid connection.

ARTHUR PARKER.

.lVitnesses1 v Y J. W. Mannen, v Y

WM. A. Kianussnn.

Certificate of Correction.

Itis hereby certified that in Letters Patent No. 1,413,679, granted April 25, 1922, upon the application of Arthur Parker, of Haddon Heights, New Jersey, for an improvement in Push Button for Automatic Overload, errors appear in the printed specification requiring correction as follows: In the grant, line 8, the name of the first-mentioned assignee was erroneously Written and printed as G. Buokvvalter, Whereas said name should have been Written and printed as Leon G. BuckwaZter; strike out present line 17 and insert Arthur Parker, Leon G.BuccwaZte1-, and Charles Reddinvtheir heirs or assigns; and that said Letters Patent should y be read With these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 16th day of May, A. D., 1922.

[SEAL] KARL FENNING,

Acting Commissioner of Patents. 

